100% Polyester 6 Panel structured Oklahoma Short Name Polyester Baseball Cap with buckram and 6 sewn eyelets has curved brim with approximately 4" crown height one size fits most adult. The back closure is adjustable hook/loop tape closure and it is manufactured with high quality standard control in Vietnam. Our baseball caps are well designed and certified by Intertek for passing lead level test that assure you for our use of harmless materials.